Founder effect occurs if a small group moves from home to new settlements, this new family will have dissimilar allele frequencies from the original population it may be by chance either lack come alleles or have high frequency of others while population bottlenecks occurs when a large decrease in the size of an original population can eliminate a large amount of genes.
23. How does mutation increase genetic variation in a way that crossing over and independent assortment do not? This because during mutation selection removes deleterious alleles however, dangerous recessive alleles are preserved in heterozygotes and are reintroduced by mutations
24. How does mutation alter allele frequencies? are a continual source of genetic variation in …show more content…
What is natural selection? Contrast positive selection and negative selection.
Is the differential survival and reproduction of individuals with a particular genotype/phenotype Negative and Positive selection- both lead to changes in allele frequencies.
Negative selection is getting rid of non-adaptive trait (the trait doesn't help to survive and reproduce) while Positive selection is retaining an advantageous (adaptive) trait
27. How does natural selection differ from artificial selection? Is the differential survival and reproduction of individuals with a particular genotype/phenotype Negative and Positive selection- both lead to changes in allele frequencies while artificial selection is controlled breeding with the intent of perpetuating individuals with a particular phenotype
28. Why do purebred dogs suffer from so many genetic diseases?
The main problem with purebreds stems from the simple fact that to create a purebred puppy you need two dogs from the exact same gene pool. This gene pool is already limited, As many of these gene pools are limited or closed, the risk of genetic defects rises significantly with each successive coupling
29. How do antiviral and antibacterial drugs select for resistant
23. How does mutation increase genetic variation in a way that crossing over and independent assortment do not? This because during mutation selection removes deleterious alleles however, dangerous recessive alleles are preserved in heterozygotes and are reintroduced by mutations
24. How does mutation alter allele frequencies? are a continual source of genetic variation in …show more content…
What is natural selection? Contrast positive selection and negative selection.
Is the differential survival and reproduction of individuals with a particular genotype/phenotype Negative and Positive selection- both lead to changes in allele frequencies.
Negative selection is getting rid of non-adaptive trait (the trait doesn't help to survive and reproduce) while Positive selection is retaining an advantageous (adaptive) trait
27. How does natural selection differ from artificial selection? Is the differential survival and reproduction of individuals with a particular genotype/phenotype Negative and Positive selection- both lead to changes in allele frequencies while artificial selection is controlled breeding with the intent of perpetuating individuals with a particular phenotype
28. Why do purebred dogs suffer from so many genetic diseases?
The main problem with purebreds stems from the simple fact that to create a purebred puppy you need two dogs from the exact same gene pool. This gene pool is already limited, As many of these gene pools are limited or closed, the risk of genetic defects rises significantly with each successive coupling
29. How do antiviral and antibacterial drugs select for resistant